@nuxt/friendly-errors-webpack-plugin/src/formatters/defaultError.js

Recognizes certain classes of webpack errors and cleans, aggregates and prioritizes them to provide a better Developer Experience

'use strict'

const concat = require('../utils').concat

function displayError (severity, error) {
  const errors = concat(
    error.message,
    (error.origin ? error.origin : undefined),
    '',
    error.infos
  )

  errors.unshift([severity, removeLoaders(error.file) || error.name])

  return errors
}

function removeLoaders (file) {
  if (!file) {
    return ''
  }
  const split = file.split('!')
  const filePath = split[split.length - 1]
  return `in ${filePath}`
}

function isDefaultError (error) {
  return !error.type
}

/**
 * Format errors without a type
 */
function format (errors, type) {
  return errors
    .filter(isDefaultError)
    .reduce((accum, error) => (
      accum.concat(displayError(type, error))
    ), [])
}

module.exports = format